Is there a shortcut for restoring "hidden when minimized" MS Outlook
Solution 1:
Focus system tray using Win+B key combination. Then you can navigate to system tray using arrows to select Outlook, press Enter.
Solution 2:
You can actually do just that, without much trouble at all, and with a single shortcut key. I've written an article covering how to do it:
Keyboard Ninja: Create a Hotkey to Switch to Your Open Outlook Window
In short, you'll just tack /recycle to the end of a shortcut, and add a shortcut key.